forked from jinzhu/gorm
/
naming.go
135 lines (113 loc) · 2.85 KB
/
naming.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
package gorm
import (
"bytes"
"strings"
)
// Namer is a function type which is given a string and return a string
type Namer func(string) string
// NamingStrategy represents naming strategies
type NamingStrategy struct {
DB Namer
Schema Namer
Table Namer
Column Namer
}
// TheNamingStrategy is being initialized with defaultNamingStrategy
var TheNamingStrategy = &NamingStrategy{
DB: defaultNamer,
Table: defaultNamer,
Column: defaultNamer,
}
// AddNamingStrategy sets the naming strategy
func AddNamingStrategy(ns *NamingStrategy) {
if ns.DB == nil {
ns.DB = defaultNamer
}
if ns.Table == nil {
ns.Table = defaultNamer
}
if ns.Column == nil {
ns.Column = defaultNamer
}
TheNamingStrategy = ns
}
// DBName alters the given name by DB
func (ns *NamingStrategy) DBName(name string) string {
return ns.DB(name)
}
// TableName alters the given name by Table
func (ns *NamingStrategy) TableName(name string) string {
return ns.Table(name)
}
// TableName alters the given name by Table
func (ns *NamingStrategy) SchemaName(name string) string {
return ns.Schema(name)
}
// ColumnName alters the given name by Column
func (ns *NamingStrategy) ColumnName(name string) string {
return ns.Column(name)
}
// ToDBName convert string to db name
func ToDBName(name string) string {
return TheNamingStrategy.DBName(name)
}
// ToTableName convert string to table name
func ToTableName(name string) string {
return TheNamingStrategy.TableName(name)
}
// ToSchemaName convert string to schema name
func ToSchemaName(name string) string {
return TheNamingStrategy.SchemaName(name)
}
// ToColumnName convert string to db name
func ToColumnName(name string) string {
return TheNamingStrategy.ColumnName(name)
}
var smap = newSafeMap()
func defaultNamer(name string) string {
const (
lower = false
upper = true
)
if v := smap.Get(name); v != "" {
return v
}
if name == "" {
return ""
}
var (
value = commonInitialismsReplacer.Replace(name)
buf = bytes.NewBufferString("")
lastCase, currCase, nextCase, nextNumber bool
)
for i, v := range value[:len(value)-1] {
nextCase = bool(value[i+1] >= 'A' && value[i+1] <= 'Z')
nextNumber = bool(value[i+1] >= '0' && value[i+1] <= '9')
if i > 0 {
if currCase == upper {
if lastCase == upper && (nextCase == upper || nextNumber == upper) {
buf.WriteRune(v)
} else {
if value[i-1] != '_' && value[i+1] != '_' {
buf.WriteRune('_')
}
buf.WriteRune(v)
}
} else {
buf.WriteRune(v)
if i == len(value)-2 && (nextCase == upper && nextNumber == lower) {
buf.WriteRune('_')
}
}
} else {
currCase = upper
buf.WriteRune(v)
}
lastCase = currCase
currCase = nextCase
}
buf.WriteByte(value[len(value)-1])
s := strings.ToLower(buf.String())
smap.Set(name, s)
return s
}